Draft regulator



Sept .25, 1923. I 1,469,159

W. L. KEENE DRAFT REGULATOR Filed Sept. 2, 1921 S Sheets-Sheet 1 Qwuentoz William L. Keene 1. 25 l 23. Sap 9 w. KEENE DRAFT REGULATOR Filed Sept. 2,

1921 3 Sheets-Sheet 2 Sept. 25 1923. 1,469,159

W. L. KEENE III-RAFT REGULATOR Filed Sept. 2. 1921 s Sheets-Sheet 5 Zlwvcnroc William LKeene Patented Sept. 25, 1923.

' UNITED S raits:

iaeaisa PATENT orei ce;

WILLIAM 'L EENE, or WATERVILLE, MAINE.

\ mu e mam-Mes;

imitates flied, stalemate, 1921} Serial Nb. 497,998.

To all whom it may concern: p 7

Be it known that I, WILLIAM LgKEENE,

a citizen of the United States, residing at \Vaterville in the county of Kennebec' and State of Maine, have invented certain new and useful Improvements in Draft-Regailators, of which the following is aspecification.

My said invention relates to an improved heat regulator designed partloularly for use in regulating furnaces for dwellinghousesdevices and in various situations.

In its preferred form my inventionycpn stitutes an'improvement over that described in my applicationNo. 142;78 filed January. 25, 1921. It is an objectof my invention is prevent strayelectrical circuits in themeca anisni, the electrical connections being en tirely insulated from the framework of the device.

Another improvement relates to the con struction by which operation of the diaft and damper of a furnace or similar controlling elements in other heating instrumentalities are regulated, e. g.,accrd1ng to the pressure in the steam boiler. Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar P 1 i. 1 1: 1 Figure 1 shows a side elevation of my improved device, 7

Figure 2 a plan thereof, M Figure 3 a diagrammatical view inns trating the mechanism with which-it is used and the relative location of the related J i I drives-a pinion 41 onla sh aft 42which alsofragment partly X in section showing details of the electric ,circuit,=- and Figureb, a detail-of a sleeveand cams devices,

Figure 4, a

shown as being of the diaphragm type, connected by a pipe to a steamboiler or like instrumentality. A plunger 12v on the 'dia phragm is adapted toactuate a'leverld normally depressed by a weight 14. V A rod 15 extends vertically above thelever carries an adjustable collar 16 which be moved into positio njtehold therod and connected lever in elevated positionior'w ch m y be eld u b e g el ems t-isuch for example as that shewn in application:

and the like but applicable to various heating f the'flo'o'r' above'the pressure device 11 or o'n asupport arranged convenient thereto is' a fixed frame 17 which supportsa clockwork mechanism. The frame 17 comprises side" members which support various elements'of the clockwork at different elevations above the floor. These elements 'inelude a main shaft 18 having oppositely directed'arms 19'and 20 at opposite ends thereof, the arms being shown in dotted lines in Figure 1. Arm 19 is connected by a chain 21 to a rock arm 22 on a damper 23 in the pipe24 leading from furnace 25. Arm 20is connected by a chain 26 to the furnace door-'27.- Counter-weights conneCt- I ed to the arm 22" and to the chain 26 keep therii 'both 'in-open position- Shaft 18-also tends to drive the shaft in a clockwise direction'. A rac'het 34 also fixed to shaft 3O cooperates with a pawl 35 ongear 29 to drive the ear. A pawl 36 on the frame is normally held out of engagement with'a notched disk 37 on shaft-18 by a lever 38,

the upward movement of the pawl being limited by a bent wire 39 extending over the pawl. A'pin 32 near theend ofthe' chain v lifts the lever 38 and lowers the pawl, which engages the notch-in disk 37 and stops ro tation of shaft 18, to prevent the chain I running oif the sprocket, and act asa safety device. to stop 7 the machine from working with the dampers'closed- Shaft 18 has fixed thereto a gear 40 which has fixed thereto a gear 43 driving a pinion 44 on a shaft 45'. Shaft 45 carries a gear 46- which drives a pinion 47 on ashaft 48.

The latter shaft carries a rotary fan brake 49 of ordinary type between the frame membersrand has wires coiled about one end, the

extremitiesof the wires projecting to form arms 50. a

Shaft 18 carries also a series of notched disks 51, 52and 53 which are adapted to controlthe ordinary rotations thereof, the

first. two being integral with a sleeve held on'jthe shaft by a set-screw. A pairof lockingfvpawls 54 and 55 have downward re'jeefionsgreeting on the peripheries of'the disks grand 52' respectively; The disks have ggs ,j'ti notch'p ijonabein g 180? distant ir i pawls is lowered by i coac Jig with a projecting pin. 60.01; the

frame to limit up and down movementv of the. rod; rod also passing through a gu ewzry' in said pin. Collar 56 has a projecting pin. 61 engaging a lever 62 pivoted on a bracket; 63 projecting from the frame 1?, the lererhaving abent-up portion engaging locking pawl 55. Collar 5? has a pin (not shown) nro e'ctin directl beneath the locking 3a-wl V natelv to lock the shaft 48 against no 54.- Tt will be seen that upward'inovement;

of rod 15 will cause the pawl 54 to heraised,

and will lower the projection of lever 62 to permit depression of pawl 55. whereby its; forward end may engage and hold the corr'esponding arm 50. w

The locking-pawls 54 and 55 act a ter- A rod 63 is adapted at one endto en tion thereof and adjustab-ly"connected to the other by a set screw. An armature pivotally mounted on a fixed frame is adapt ed to-retract rod 63 and the armatur rise a lug or hook to engage the 1".

net-s 66 when energized retract the ture and the rod connected thereto, the

electro-inagnets being mounted on an: Tin .dependent support.

The armature has a tached thereto preferably in the form of a. sleeve.

rod 63 may also be held in retracted'posh tion.v p

The connections hitherto described ser for controlling the operation of the device,

according to the temperature of the heati a; medium such as steam or hot water; Th

invention also comprises an electric circuit-I for energizing magnets 66. This circuit in eludes terminals 72 and" 73 adapted to b connected in any convenie t way to a source of direct current. From terminal i211 wire 73 passes to an insulated binding-post let on the fixed f1tI11,-tl1l$ binding-post being in the form of a'holt having an enlarged head 75 provided with a guide for the rod 63 and preferably enclosing a spring; hear "l 4- n mg against a shoulder or roe. 63 loi n10 ingt to the left into engagement with the periphery, of disk On one side of the. 1 'headis mounted a contact member 76 in the of a le pr h h cpsta tsthe gage a notch in disk 53. The rod has a sleeve. 64; intermediate its length fixed to one" sec be interrupted. 'now closed and rod 1'5will remain in its upper position so longjas the steam presdownward projection I with a mass of insulating material 67 sit-Iv A slide 68 controlled by a rocking" .arm;69, with a handle 70 is provided with a vertical fin 71 by means of which the periphery of disk 53. This dish is insulated from the" shaft and hasa 131'016Cl31011 if? adapted to contact at intervals with a second leafpring contact 78 on an insulated 'post 79' mounted onoframe 17. A wire 80 is fixed at one end to the post Y9 and at "the otherend to the upper electr'o-niagnet.

' sufficiently to lift the lever 13 and rod 15.

When this occurs detent 54; is elevated, re-

leasing the outer wire arm 50., TherotatlOn of shaft 48 now being; unopposed weight 33 will cause the clockwork to move until detent 55 engages the notch in disk. 52am itsend engages the otherwire arm; 50when the rotation of shaft 48 will again The draft and damper are which is in circuit with theelectro-n'iagnets- 66. J llian the temperature of the room falls to predetermined level the thermostat will close the circuit and energize the electro-magnets thus removing; the armature with itslug' out of: the path'o't arm" 50 and permitting the weight to rotate shaft 18 until thenotch on disk 51 ag in lowers the 'detent 5st when the parts are in their orir (I Y control may be omitted if'desired. the particular inal position. The thermostatic arrangein enthere shown being); intended to prevent overheating of rooms and waste of fuel sincemere fall of steain' pressure will 7 not 0 sen the drafts; the electric circuit preventing such action until'the temperature of the rooms to be heated falls suiliciently to close the circuit at the thermostat;

It will he obvious to those skilled in the ous parts thereof may be modified invarious particularswithout departing from the spirit of the invention or the scope of the appended claims. Therefore I do not limit myself to the specific embodiment of the invention shown in the drawing anclpd ,1. In a heat regulator, a shaft, meansconnected thereto for operating a draft controlling device of a furnace, clockwork mechanism for driving the shaft, and other mechanism to control said clockwork comprising devices responsive to changes of pressure in the heating medium, substantially as set forth.

2. In a heat regulator, a shaft, means con nected thereto for. operating a draft controlling device of a furnace, means for driving the shaft, and mechanism to control said driving means comprising clockwork connected to the shaft, a second shaft driven by such clockwork, arms projecting from said shaft, detents to engage the armsv and lock the clockwork against movement, temperature controlled means for releasing some of the detents and pressure controlled means for releasingthe remainder of the detents, substantially as set forth. I

3. In a heat regulator a frame, a shaft, means connected thereto for operating a draft controlling device of a furnace, means for driving the shaft, and mechanism to control said driving means comprising clockwork connected to the shaft, pawls pivoted to the frame and adapted to engage an element ofthe clockwork to lock the same-agains movement, temperature controlled. means to release said pawls alternately, and disks on said shaft to hold said pawls in released position, substantially as set forth.

4. In a heat regulator a frame, a shaft, means connected thereto for operating a draft controlling device of a furnace, means for driving the shaft, and mechanism to controlsaid driving means comprising clockwork connected to the shaft, p-awls pivoted to the frame and adapted to engage an element of. the clockwork tojlock the same against vmovement,.means connected to the, furnace to operate the paivls at times and temperature controlled. means for operat- ;ing said pawls a'tother times, substantially as set forth.

In a heat regulator aframe, a shaft, devices connected thereto for opening and closing the draft controlling means of a furnace, means for driving the shaft, and

erated by the pressure device for releasing said pawls, and means on the shaft for holding said pawls out of locking position alternately during a half-revolution 'of the shaft, substantially as set forth.

6. In a heat regulator, ashaft, means connected thereto for operating a draft controlling device of afurnace, means for driving the shaft, and mechanism to control said driving means comprising lockingpawls to engage amoving part of the mechanism and lock the whole against movement, a pressure device connected to the furnace,- a reciprocating rod controlled by the pressure device, and means on the rod for alternately releasing said locking pawls, substantially as set forth.

7. In a heat regulator, a shaft, devices connected thereto for opening and closing the draft controlling means of a furnace, means for driving the shaft, and mechanism to control said driving means comprising locking pawls to engage a part of I the moving mechanism and lock the whole against movement, means donnected to the furnace, H"l6C1pIOC21 J1n rod controlled by the last said means, a lug on the rod adapt ed to disengage one of thepawls on movement in one direction, a .lever engagingthe other pawl, and a lug on the rod engaging the lever to disengage said other pawl'on movement of the rod in the opposite direct;

tion, substantially as set forth.

8. In a draft re ulator a frame a shaft devices connected thereto for opening and closing the draft controlling means of a furnace, .means for driving the shaft, and. mechanism to control said driving means comprising a disk on the shaft, insulated therefrom and having a notch, adetent adapted to engage the notch and hold the I shaft from rotation, an. armature pivoted to.

the frame and attached to said detent, an eiectro-magnet for said armature, an energizing circuit for said electro-magnet. including amember constantly in contact with said diskand a member positioned to engage a lug on the disk,.and a thermostat in a room to be heated said thermostat adapted to close said circuit, substantially as set forth. l 9. In a draft regulator, a shaft, means connected thereto for operating a-draft-controlling device of a furnace, means for driving the shaft, and mechanism to control said driving means comprising means for locking said shaft against moven'ient, an electric circuit to release said locking means,

temperature controll d means for closing-- the circuit at one point to withdrawsaid locking means at times and other means attached to the furnace for mechanically operating the mechanism to cdntro'l the said driving means for withdrawing the locking means at other times, substantially as set forth. I I

10. In a draft regulator, a shaft, means iii.

connected thereto for operating a draft controlling device of a furnace, means for driving the shaft,-and mechanism to control said driving means comprising a disk on the shaft insulated therefrom, a lug on the disk, a detent to lock the shaft against rotation, and an electric circuit controlling said detent including a conductor in engagement means connected thereto for opening and closing a draft controlling device of a furnace, means for driving the shaft, and mechanism to control said drivin means comprising a notched disk on the shaft insulated therefrom, a lug on the disk, a resilient contact member engaging the periphery of the disk and cooperating with the notch to lock the mechanism, a resilient contact member adapted to engage said lug to establish an electrical circuit and insulated binding posts on the frame for said resilient contact members, substantially as set forth.

13. In a heat regulator a frame, a shaft, means connected thereto for opening and closing a draft controlling device of a fur nace, means for driving the shaft, and mech: anism to control said driving means comprising a disk on the shaft, said disk havinga notch, a rod adapted at its end to engage said notch, an electro-magnet adjacent thereto, an armature movably mounted on the frame of the regulator and connected to the rod, a shaft driven from the first said shaft, an arm on theshaft, and a lug 0n the armature forming a stop for said arm, substantially as set pawls having forth.

14-, In a heat regulator, a shaft, means connected thereto for opening and closing a draft controlling device of a furnace, means for driving the shaft, and mechanism to con trol said driving means comprising plurality of disks on the shaft, a plurality of lugs resting on some of said disks and adapted to engage notches there in, a. shaft driven from the first said shaft, arms on the second shaft adapted to be engaged and held against rotation by said pawls, another pawl adapted to engage one of said arms, means controlled directly from the heating medium for disengaging said first-named pawls and means controlled from a room to be heated for disengaging the last named pawl, substantially as set forth.

1.5,ln aheat regulator, a shaft, means connected thereto for operating a draft con trolling device of a furnace, means for driving the shaft, and mechanism to control said driving means comprising a pairof pawls for alternately locking the draft'regulatmg devices in open and in closed position, means operated directly by the heating medium for disengaging said pawls alternately, an additional pawl for locking said mechanism, and

medium for unlocking said locking means,

and auxiliary means to prevent opening of the draft controlling devices until a predetermined temperature is reached in the space to be heated, substantially as set forth.

1?. In a heat regulator, a shaft, means connected thereto for operating a draft controlling device of a. furnace, clockwork mechanism for driving the shaft, and other mechanism to control said clockwork com prising means mechanically connecting the furnace and the said mechanism said means beingcontrolled by the heating medium, substantially as set forth.

18, In aheat regulator, a shaft, means connected thereto for operating a draft con trolling device of a furnace, clockwork for driving the shaft, and mechanism to control said clockwork comprising pressure con-- trolled means attached to the furnace and mechanically connected to the said mechanism, substantially as set forth. I

In 'witness whereof, I have hereunto set my hand and seal at W aterville, Maine, this twenty-ninth day'of July, A. D. nineteen hundred and twenty-one.

WILLIAM L manna. LJ s] W itnesses ELWooD M. JEPsON, RALPH MAROHETTI. 

